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The Big BoyV2 [updated version]

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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The Big BoyV2 [updated version]

Unread postAuthor: MRR » Mon Aug 03, 2009 2:49 pm

I've build this "little" beast for a friend and before I give it to him tomorrow I'd like to share it with you guys.


Data:
Type: barrel sealing piston valve.
Total length: 138cm
Piston: 1 1/4" epoxy-bolt combination -> 1" porting
Chamber: 50cm galvanized steel -> 1 1/4"
Barrel: 1m / 28mm copper pipe
Pilot: 3/8" 3/2-DCV
Filling: compressor quick connect with check valve


The old version of the BigBoy
Image


I had the BigBoy at home a couple of days for maintenance. I haven't build anything for quite a while now and the "fever" hit me once again. :twisted:
After I repaired the sealing face I decided to modify and pimp it a little. The overall result is quite good....

Image

Image

The breach is made of two ?bayonet couplings? (couldn't find the english expression) which match perfectly the id of the barrel (I love it when things fit together).
Image

The trigger is the 3-way valve that is described in this post.
http://www.spudfiles.com/forums/diy-3-2-dcv-video-t21061.html
Image

I've build a check valve into the fill port. Now you can leave it hooked up to the compressor or disconnect the gun.

A little destruction :twisted:

115 gram lead @230 psi

[youtube]http://www.youtube.com/watch?v=puAIZqvXeC4&feature=channel_page[/youtube]
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Last edited by MRR on Sun Jan 02, 2011 5:10 pm, edited 5 times in total.

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Unread postAuthor: jrrdw » Mon Aug 03, 2009 3:33 pm

Your friend should be very pleased :D . The costume trigger looks very clean and sets the rest of the cannon off nicely. Job well done! :D
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Unread postAuthor: Mitchza89 » Tue Aug 04, 2009 8:24 am

Love it mate. Reminds me a lot of my own guns.

Keep it up!

Mitcho
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Re: The Big Boy

Unread postAuthor: jackssmirkingrevenge » Tue Aug 04, 2009 12:35 pm

MRR wrote:I've build this "little" beast for a friend and before I give it to him tomorrow I'd like to share it with you guys.


Nice launcher, not to be pedantic but I would type out a note relieving you of any responsibility in the event that your friend maims/injures/kills himself or anybody else while using the launcher or damages anyone's property and make him/her sign it before handing it over.
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Unread postAuthor: theBOOM » Tue Aug 04, 2009 12:39 pm

Yes having a disclaimer or something wouldn't hurt...
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Unread postAuthor: MRR » Tue Aug 04, 2009 12:50 pm

Building, using and owning these devices is illegal in my country.

By the definition of our law, making a contract over an illegal subject, nullifies the legally valid of it (hope I wrote that right :roll: ).

I think I have to trust him (what I do).
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Unread postAuthor: boyntonstu » Tue Aug 04, 2009 12:58 pm

Give to your friend in pieces.

He assembles it, etc.


That is why they sell kit planes.

BoyntonStu
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Unread postAuthor: MRR » Tue Aug 04, 2009 1:07 pm

Besides that I already gave it to him...

I should have tell you something about my friend. He is the father of two little girls and a hobby film maker. The purpose if this gun is to put some special effects into his films. I would have bigger problems to give this baby to my own brother than to him.

All in all he is a very responsible person and I don't think that he would do something that hurt others or even his own family.
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Unread postAuthor: MRR » Wed Aug 05, 2009 1:31 pm

Video update in the first post.
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Unread postAuthor: MRR » Fri Dec 31, 2010 8:43 am

I modified and pimped the BigBoy to version 2.

Pictures in the first post, hope you like it.
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Unread postAuthor: Vincenzo » Fri Dec 31, 2010 10:47 am

Looks amazing! I wish I could get those brass fittings 8) Thinking about a video?
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more_eggs wrote:My teachers hated this one:
Teacher: "Matt, take your iPod out in class"
Me: "beg your pardon sir? I can't hear you, I'm listening to my iPod"
:P
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Unread postAuthor: daniel0663 » Wed Jan 12, 2011 5:24 am

WOW ! looks Really awesome.
Love your homemade trigger system.
Must of been expensive to make with all that brass parts.....
Where did you get the "bayonet couplings"?
i searched all over the pumbling store and they didn't have it.

Again awesome gun !!.
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